What are arteries arterioles capillaries venules and veins?

What are arteries arterioles capillaries venules and veins?

Arteries transport blood away from the heart and branch into smaller vessels, forming arterioles. Arterioles distribute blood to capillary beds, the sites of exchange with the body tissues. Capillaries lead back to small vessels known as venules that flow into the larger veins and eventually back to the heart.

What are the 3 parts of arteries and veins?

Anatomy of veins and arteries

  • Outer. Tunica adventitia (tunica externa) is the outer layer of a blood vessel, including arteries and veins.
  • Middle. The middle layer of the walls of arteries and veins is called the tunica media.
  • Inner. The inner layer of the blood vessel wall is called tunica intima.

What are the 3 types of capillaries?

The 3 types of Capillaries

  • Continuous capillaries. These are the most common types of capillaries.
  • Fenestrated capillaries. Fenestrated capillaries are “leakier” than continuous capillaries.
  • Sinusoid capillaries.

What are arteries?

The arteries are the blood vessels that deliver oxygen-rich blood from the heart to the tissues of the body. Each artery is a muscular tube lined by smooth tissue and has three layers: The intima, the inner layer lined by a smooth tissue called endothelium.

What are veins?

Veins carry deoxygenated blood towards your heart and are often located close to your skin. Veins don’t have a muscular layer like arteries do, so they rely on valves to keep your blood moving. Veins start as tiny blood vessels called venules, which become full-size veins as they come closer to your heart.

Where is a woman’s heart?

The heart is in the chest, slightly left of center. It sits behind the breastbone and between the lungs.

What is a Arteriole?

An artery carries blood away from the heart, and distribute throughout the body by its succeeding smaller branches. Eventually, the smallest branch of the artery is called arterioles, which further divide into tiny vessels to form the capillary bed.